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<meta charset="utf-8">
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<title>Web Compatibility requirements for implementation-defined locale-specific JavaScript APIs</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>

test(t => { // https://bugs.chromium.org/p/chromium/issues/detail?id=1414292

  const date = new Date('2022-12-31T23:59:42');
  const localeString = date.toLocaleString('en-US');

  // No U+202F NARROW NO-BREAK SPACE must be present.
  assert_false(localeString.includes('\u202F'));
  // The character between the time and AM/PM should be U+0020 SPACE.
  assert_regexp_match(localeString, /:\d\d:\d\d\x20[AP]M/);

}, '`Date.prototype.toLocaleString` produces U+0020 instead of U+202F for `en-US` locale');

test(t => { // https://bugs.chromium.org/p/chromium/issues/detail?id=1414292

  const date = new Date('2022-12-31T23:59:42');
  const formatter = new Intl.DateTimeFormat('en', {timeStyle: 'long'})
  const formattedString = formatter.format(date);

  // No U+202F NARROW NO-BREAK SPACE must be present.
  assert_false(formattedString.includes('\u202F'));
  // The character between the time and AM/PM should be U+0020 SPACE.
  assert_regexp_match(formattedString, /:\d\d:\d\d\x20[AP]M/);

}, '`Intl.DateTimeFormat.prototype.format` produces U+0020 instead of U+202F for `en` locale');

test(t => { // https://bugs.chromium.org/p/chromium/issues/detail?id=1418727

  const date = new Date('2022-03-31T23:59:42');

  assert_true(date.toLocaleString('en-CA').includes('2022-03-31'));
  assert_equals(date.toLocaleString('en-CA', {dateStyle: 'short'}), '2022-03-31');

}, '`Date.prototype.toLocaleString` produces `yyyy-mm-dd` instead of `m/d/yyyy` for `en-CA` locale');

test(t => { // https://bugzilla.mozilla.org/show_bug.cgi?id=1864612
  assert_true(new Intl.DateTimeFormat('sv-SE', {}).format(0).endsWith('-01-01'));
});

</script>
